The Oknha Mong Port (OMP), was the first Private Investment Sea Port in the  Kingdom of Cambodia, it is located in Keo Phos village, Chroy Svay commune, Sre Ambil district, Koh Kong province. It consists of  64 ha of land. Construction started on January 01^st, 2003. OMP is also the most important economic outlet and the future core of commercial, industrial and tourism development.

The OMP commenced operation in August 01^st, 2004.

In the first step, the port concrete was constructed with 309m long 20m wide and 5m depth along 1,700m pier.
In the second step, OMP plans extend the port with 200m long, 20m wide and 7m depth. The company expects this project will be completed not longer than 24 months. The new port will then be available for international big vessels with a loading capacity of more than 5,000 tons.